Can't post or edit

This problem started last week. I can insert a title for a new post but, when I try to type the text in, nothing happens. No curser to allow typing. My “add media” button no longer works, and I cannot edit any of my old posts. Nothing shows up under the title. It’s as if I’m locked out as the author. I’ve upgraded to 4.5, cleared cookies and caches, deactivated plugins, and updated my theme. Still nothing. I’m effectively shut down. I believe there’s an error in the coding and am unable to troubleshoot this myself. Please help! My site is: canadianspeaks.com